Hi! Thanks for the feedback, some interesting ideas in there!
Tempo sync with the host for all time-based parameters is pretty high on my list (that includes #2 and #5)
Many of these would be interesting and probably not too difficult to do (like more LFO shapes and grain envelopes). Others (like midi support or effects in the feedback path) would require more thought but not at all impossible.
Another often-requested feature is multi-out: each stream having it’s own independent stereo output. This is likely coming in the near future. Along with proper installers on mac because that process is not really user-friendly at the moment.